﻿//====================================================================================================================
//Copyright (c) 2011 IdeaBlade
//====================================================================================================================
//Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
//documentation files (the "Software"), to deal in the Software without restriction, including without limitation 
//the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, 
//and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//====================================================================================================================
//The above copyright notice and this permission notice shall be included in all copies or substantial portions of 
//the Software.
//====================================================================================================================
//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
//WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS 
//OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
//OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
//====================================================================================================================

using System.ComponentModel.Composition;
using Caliburn.Micro;
using HelloWorld.Events;

namespace HelloWorld.ViewModel
{
    [Export]
    public class MainFrameViewModel : Conductor<IScreen>, IHandle<LoginSuccessful>
    {
        private readonly ILoginScreen _loginScreen;
        private readonly IMainScreen _mainScreen;
        private readonly IEventAggregator _eventAggregator;

        [ImportingConstructor]
        public MainFrameViewModel(ILoginScreen loginScreen, IMainScreen mainScreen, IEventAggregator eventAggregator)
        {
            _loginScreen = loginScreen;
            _mainScreen = mainScreen;
            _eventAggregator = eventAggregator;
            _eventAggregator.Subscribe(this);
        }

        protected override void OnInitialize()
        {
            base.OnInitialize();
            ActivateItem(_loginScreen);
        }

        #region Implementation of IHandle<in LoginSuccessful>

        /// <summary>
        /// Handles the message.
        /// </summary>
        /// <param name="message">The message.</param>
        public void Handle(LoginSuccessful message)
        {
            ActivateItem(_mainScreen);
        }

        #endregion
    }
}
